int Blinelen(Biobufhdr*);
vlong Boffset(Biobufhdr*);
Biobuf* Bopen(char*, int);
+Biobuf* Bfdopen(int, int);
int Bprint(Biobufhdr*, char*, ...);
int Bvprint(Biobufhdr*, char*, va_list);
int Bputc(Biobufhdr*, int);
void Berror(Biobufhdr*, char*, ...);
#pragma varargck argpos Bprint 2
+#pragma varargck argpos Berror 2